What actress and singer who played a starring role in "Grease" was a special guest during the Mormon Tabernacle Choir's 2015 Christmas shows? 
Laura Ann Osnes
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Hallelujah! (Mormon Tabernacle Choir album)
51898113
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Hallelujah! (Mormon Tabernacle Choir album)
51898113
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Section::::Abstract.
Laura Osnes
9586681
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Section::::Abstract.
Laura Osnes
9586681